York Corporation, York PA Stainless Steel Falling Film Plate Chiller. Serial: 18588. Number of plates: 6. Max Working Pressure: 150 PSI. Max temperature: G.650F. Test pressure: 300 PSI (HYD). Refrigerant: nameplate isn’t completed, but this was previously used in an ammonia application. Nameplate is attached to the horizontal steel refrigerant feed tank. Date: 10-18-48. Plates are approximately 42 in. x 42 in. Stainless steel non-insulated sump tank: 48 in. W x 52-76 in. L x 36 in. H (500 gallons approx). Ammonia ports: (1) 2 in. top, (2) 1 in. side. Overall dimensions: 4 ft. 6 in. W x 8 ft. 6 in. L x 9 ft. H. (H)